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Take Assessment ESwitching Final Exam

CCNA Exploration: LAN Switching and Wireless(Version 4.0) Answers 2012 2013

Update Apr 2012 >80%

1.

Refer to the exhibit. What happens when a frame from a source MAC

address different from 00a8.d2e4.ba27 reaches switch port 0/5?

The frame is dropped.

The port is shut down.

An error message is displayed.

FastEthernet port 0/5 will show an err-disabled message.

2.

Refer to the exhibit. What will allow a host on VLAN 40 on switch X to

communicate with a host in VLAN 40 on switch Y?

QoS

routing

trunking

VPN

3. A network administrator issued the erase nvram: command on a switch.

What will be the outcome of the command?

It will clear the contents of the MAC table.

It will clear the contents of the VLAN database.

It will clear the contents of the startup configuration file.

It will clear the contents of the running configuration file.

4. What type of message do wireless clients transmit when they are

searching for a specific wireless network?

probe

beacon

associate

authenticate


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5. What are two requirements for configuring inter-VLAN routing using the

router-on-a-stick model? (Choose two.)

Each subinterface should be configured with its own IP address, subnet mask,

and unique VLAN assignment.The physical interface of the router must be connected to a trunk link on the

adjacent switch.

The number of physical interfaces on the router should match the number of

VLANs.

Different static VLANs should be assigned to different interfaces of the router.

The router should be configured as the VTP server.

6.Refer to the exhibit. A network administrator needs to add IP phones to

the network. To which devices should the IP phones connect?

AS1 and AS2

DS1 and DS2

DS1, DS2, and CS1

AS1, AS2, DS1, and DS2

7. A network administrator enters the enable command at the Switch>prompt of a new switch. What mode will the switch enter?

setup mode

configuration mode

privileged EXEC mode

user EXEC mode

ROMMON mode

interface mode

8.

Refer to the exhibit. What does the term DYNAMIC indicate in the output

that is shown?

This entry can only be removed from the MAC address table by a network

administrator.

When forwarding a frame to the device with address 0060.5c5b.cd23, the

switch does not have to perform a lookup to determine the final destination port.

Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to


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port Fa0/18.

The switch learned this MAC address from the source address in a frame

received on Fa0/18.

9. Which value determines if a switch becomes the central point of

reference in the spanning tree topology?

lowest bridge ID

highest revision number

lowest numeric IP address

highest numeric MAC address

10.

Refer to the exhibit. Users A and B are reporting intermittent connectivity

problems. Pre-installation surveys showed strong signal strength from

the AP locations to the client locations. Outside electrical interference has

been eliminated. What will fix the problem?

Relocate the APs closer to each other.

Increase the distance between the clients.

Change the channel on AP-B to 6 or 11.

Place AP-A and AP-B on the same wireless channel.

11.

Refer to the exhibit. Router RA receives a packet with a source address of

192.168.1.65 and a destination address of 192.168.1.161. What will the

router do with this packet?

The router will drop the packet.

The router will forward the packet out interface FastEthernet 0/1.1.

The router will forward the packet out interface FastEthernet 0/1.2.The router will forward the packet out interface FastEthernet 0/1.3.

The router will forward the packet out interface FastEthernet 0/1.2 and interface

FastEthernet 0/1.3.

12.

Refer to the exhibit. R1 is configured for traditional inter-VLAN routing. R1

can ping computer 3 but cannot ping computer 1. What is a possible

cause for this failure?

S1 port Fa0/11 is in the wrong VLAN.


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R1 does not have an active routing protocol.

The IP address of computer 1 is in the wrong logical network.

Router interface Fa0/0 has the wrong trunk encapsulation type configured.

13.

Refer to the exhibit. A new switch, SW3, has been added to the network.

The network administrator determines that VLAN information is not

propagating to SW3. Which command will remedy the problem?

SW1(config)# vtp version 1

SW2(config)# vtp mode client

SW3(config)# vtp domain Cisco1

SW3(config)# vtp mode transparent

14. An administrator is troubleshooting a PC on the network which is

suffering from slow and intermittent connectivity. The PC has a ping

success rate to the default gateway of less than half the ping attempts.

Other PCs on the switch can consistently ping the default gateway. The

switch port is configured for auto duplex and the PC is configured for full

duplex. What will commonly cause this problem?

The PC is set to full duplex. The switch port fails to autonegotiate the duplexsetting and defaults to half duplex, which causes a duplex mismatch.

The switch traffic is exceeding available frame buffers. The result is that frames

are being dropped.

The PC and the default gateway have different bandwidth Ethernet ports.

The default gateway is not on the same switch that the PC is.

15. What is the purpose of the switch command switchport access vlan

99?to enable port security

to make the port operational

to assign the port to a particular VLAN

to designate the VLAN that does not get tagged

to assign the port to the native VLAN (VLAN 99)

16.

Refer to the exhibit. A network administrator has segmented the network

into two VLANs. The connected hosts can only access resources in their


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own VLAN. What is the most scalable and cost effective solution to allow

inter-VLAN communication in this network?

Replace S1 with a router that has one FastEthernet interface for each PC.

Add a second switch and divide the PCs so that each VLAN is connected to itsown switch.

Configure a router with two subinterfaces on one of its FastEthernet ports and

connect it to S1 using a trunk link.

Connect a router to a port on S1 and assign the IP address of VLAN1 to the

connecting router interface.

17.

Refer to the exhibit. A new host needs to be connected to VLAN 3. WhichIP address should be assigned to this new host?

192.168.1.22 /28

192.168.1.31 /28

192.168.1.32 /28

192.168.1.52 /28

192.168.1.63 /28

18. What is the purpose of the Spanning Tree algorithm?It propagates VLAN configurations to other switches.

It restricts broadcast packets to a single VLAN.

It segments a network into multiple broadcast domains.

It prevents loops in a switched network with redundant paths.

19.

Refer to the exhibit. What does LEARNING mean as it relates to the

Spanning Tree Protocol?The switch is sending and receiving data frames.

The switch is not receiving BPDUs, but is sending and receiving data.

The switch is participating in the election process by forwarding the BPDUs it

receives.

The switch is receiving BPDUs and populating the MAC address table, but not

sending data.

20. What three tasks should be performed before moving a Catalyst

switch to another VTP management domain? (Choose three.)


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Select the correct VTP mode and version.

Configure the switch with the name of the new management domain.

Download the VTP database from the VTP server in the new domain.

Configure the VTP server in the new domain to recognize the BID of the switch.Reset the VTP counters to allow the switch to synchronize with the other

switches in the new domain.

Verify that the switch has a lower configuration revision number than the other

switches in the new domain.

21. Which method establishes an administrative connection for

configuring the Linksys WRT300N wireless access point?

Associate with the access point and then open a HyperTerminal session withthe access point.

Physically connect to the access point and then reboot the computer to launch

the configuration software.

From a computer in the same IP subnet as the access point, enter the default IP

address of the access point in a web browser.

Modify the TCP/IP properties of the computer connected to the access point so

that it exists on the same network, and then reboot your computer to establish a

connection.

22. How does a switch that is configured for 802.1Q trunking handle

untagged frames that are received on a trunk port?

The frames are dropped.

The frames are assigned to the native VLAN.

The frames are assigned to the default VLAN.

The frames are assigned to the management VLAN.

23. In which mode is a VTP switch operating if it has been configured to

only forward VTP advertisements?

client

root

server

transparent

24. Why is it important that the network administrator consider the

spanning-tree network diameter when choosing the root bridge?


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The network diameter limitation is 9.

BPDUs may be discarded because of expiring timers.

The cabling distance between the switches is 100 meters.

The network diameter must be set to the number of meters of the cablebetween the root bridge and its farthest connected switch.

25.

Refer to the exhibit. What would happen if the network administrator

moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch

SW1?

Host A remains a member of VLAN 10, because the router is routing traffic

between VLANs.Host A is no longer a member of VLAN 10, because port Fa0/3 has been

manually assigned to VLAN 30.

Host A remains a member of VLAN 10, because the switch provides dynamic

VLAN assignment for the port.

Host A maintains connectivity to all members of VLAN 10, because it is

connected to the same physical network.

Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused,

it is now a member of VLAN 1.

26. Which feature is uniquely found in an access layer switch within a

hierarchical network model?

link aggregation

Power over Ethernet

access control lists

Layer 3 routing capabilities

27. While configuring a new switch, a network administrator configures

the switch as an HTTP server. What benefits does this configuration

provide?

This allows the switch to host web pages for the network.

This allows remote VPN connections to the switch over the Internet.

This is required if a web server or web farm is attached to the switch.

This allows web-based configuration tools to be used with the switch.


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28.

Refer to the exhibit. Each switch is configured to participate in STP for

VLANs 1, 10, 20, and 30. Which switch will become the root for VLAN 20?

AB

C

D

29. Using the command copy tftp:backup.cfg startup-config, an

administrator downloaded a saved configuration from a TFTP server to a

switch. Why does the administrator not detect any changes in the switch

configuration after the download completes?The command should have been copy startup-config tftp:backup.cfg.

A backup configuration from a TFTP server cannot be copied directly into the

startup-config.

The command copy running-config startup-config should be used to save the

changes on the switch.

Downloading to the startup-config requires the switch to be reloaded in order for

the configuration to take effect.

30.

Refer to the exhibit. Which two settings show the default value of VTP

configuration on a Cisco 2960 switch? (Choose two.)

revision number

existing VLANs

operating mode

domain name

pruning mode

31. Why is it advisable that a network administrator use SSH instead of

Telnet when managing switches?

SSH uses TCP whereas Telnet does not.

SSH encrypts only the username and password when logging in.

SSH encrypts all remote management communications whereas Telnet does

not.


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SSH sends a clear text message steam which reduces the bandwidth use for

management.

32.

Refer to the exhibit. The Layer 2 switching design that is shown has been

implemented in a campus environment that is using Spanning Tree

Protocol. All inter-switch links that are shown are trunks. Whenever an

inter-switch link fails, the network takes nearly a minute to completely

converge. How can the convergence time be reduced?

Increase the capacity of the distribution and core trunk links to 10 Gb/s.

Add a trunk link that directly connects D1 and D2.

Use Layer 3 switching on the core switch.Implement Rapid Spanning Tree Protocol.

33.


into two VLANs and configured R1 and S1 as displayed. However, PC1 is

unable to access PC2. What is the likely problem?

No routing protocol is configured on R1.

The Fa0/1 port of S1 is not a trunk port.The default gateway address is not set on S1.

Only one physical link between S1 and R1 is configured for inter-VLAN routing.

34.

Refer to the exhibit. A network has already been configured with VTP,

using DLS1 as the VTP server for the VTP domain Cisco. What will happen

when the DLS2 switch is connected to the DLS1 switch via a trunk link?

Because the VTP domain is not configured on DLS2, nothing will happen.Because DLS2 is in client mode, it will be updated with the VLANs that are

configured on DLS1.

The MD5 digest on DLS2 does not match the one on DLS1, so an error

message will be logged to the console.

Because DLS2 has a higher revision number than DLS1 has, the VLAN

information on DLS1 will be overwritten by the information on DLS2.

35. What information in an Ethernet frame is used by a Layer 2 switch to

build its address table?


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source IP address

source MAC address

destination IP address

destination MAC address

36. A wireless LAN access point will convert traffic between which two

frame encapsulation types?

802.1 and 802.11

802.3 and 802.11

802.3 and 802.16

802.5 and 802.16

37. A network administrator is asked to connect four switches that are

each configured with eight VLANs. Routers that have two FastEthernet

ports each that support trunking are available. What is the minimum

number of routers needed to interconnect traffic from all of the VLANs if

trunking is allowed?

1

2

48

16

38.

Refer to the exhibit. The network consists of four hubs and a switch. The

hosts connected to each hub are assigned addresses in the respective

VLAN as shown. PC1 on VLAN 1 becomes infected with a virus and

initiates a continuous IP broadcast. Which hubs will receive the

broadcasts?

Hub A

Hubs A and B

Hubs A and C

Hubs A, B, C, and D

39. What are two characteristics of normal range VLANs? (Choose two.)

not learned by VTP

stored in vlan.dat file


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designed for service providers

can contain ports used as trunks

identified by a VLAN ID between 1 and 1005

40. What is the benefit of the auto-MDIX feature on a Cisco Catalyst

switch?

dynamically assigns a new management VLAN ID

autonegotiates IP address information for initial management connections

allows the use of straight-through patch cables regardless of connected device

types

places a port immediately in the forwarding state to reduce the time for the

spanning tree to reconverge

41.

Refer to the exhibit. A network administrator is configuring RT1 for inter-

VLAN routing. The switch is configured correctly and is functional. Host1,

Host2, and Host3 cannot communicate with each other. Based on the

router configuration, what is causing the problem?

Interface Fa0/0 is missing IP address configuration information.

IP addresses on the subinterfaces are incorrectly matched to the VLANs.Each subinterface of Fa0/0 needs separate no shutdown commands.

Routers do not support 802.1Q encapsulation on subinterfaces.

42. Why is priority configured in 4096 increments when using PVST+?

Use of the extended bridge ID leaves only four bits for the bridge priority.

It is only a recommended value and could be any number between 1 and

65535.

PVST+ requires the use of values that can be divided equally into 32768 andnot leave a remainder.

The MAC address uses eight bytes of the bridge ID leaving only two bytes for

the bridge priority value.

43.

Refer to the exhibit. The network administrator needs to remove the east-

hosts VLAN and use the switch port from that VLAN in one of the existing

VLANs. Which two sets of commands should be used when completely

removing VLAN 2 from S1-Central while leaving the switch and all its


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interfaces operational? (Choose two.)

S1-Central# reload

S1-Central# erase flash:

S1-Central# delete flash:vlan.dat

S1-Central# configure terminal

S1-Central(config)# no vlan 2

S1-Central# configure terminal

S1-Central(config)# interface fastethernet 0/1

S1-Central(config-if)# switchport access vlan 3

44. What benefit does 802.1x provide to a wireless network?

increased wireless range

faster wireless throughput

centralized user authentication

quality of service to differentiate high priority traffic

45. Which configuration changes will increment the configuration revision

number on the VTP server?

configuring trunk links on the VTP server

configuring or changing the VTP password

configuring or changing the VTP domain name

configuring or changing the VTP version number

configuring or deleting a VLAN or creating a VLAN name

46.

Refer to the exhibit. The hosts connected to switch SW1 are not able to

communicate with the hosts in the same VLANs connected to switch SW2.

What should be done to fix the problem?

Configure VLANs with different VLAN IDs on switch SW2.

Reconfigure the trunk port on switch SW2 with static trunk configuration.

Introduce a Layer 3 device or a switch with Layer 3 capability in the topology.

Apply IP addresses that are in the same subnet to the interfaces used to

connect SW1 and SW2.


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47. What operational change will occur if an 802.11b client associates with

an access point that is currently supporting clients utilizing 802.11g?

The 802.11g clients will disassociate from the AP.

The 802.11g clients will operate at reduced speeds.The 802.11b client will never gain access to the channel.

The 802.11b client will not be able to establish an IP session with any of the

other 802.11g clients.

48. What does TKIP have in common with AES?

Both encrypt Layer 2 payloads.

Both authenticate using a shared key.

They both use sequence numbers to ensure that all packets arrive.They both use data from the MAC header to verify the integrity of the data.

49.

Refer to the exhibit. Hosts PC_A and PC_B send traffic simultaneously,

and the frames from the transmitting stations collide. What is the last

device to receive the collision?

hub HB1

switch SW1router R1

switch SW2

router R2

switch SW4

50. What happens when the crypto key zeroize rsa command is entered on

a switch configured with the transport input ssh command on the vty

lines?A new RSA key pair is created.

The switch defaults to allowing Telnet connections only.

The switch is no longer able to make SSH connections as an SSH client.

The switch allows remote connections only after a new RSA key pair is

generated.


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Update Feb 2012

1. A wireless client is attempting to establish a connection with a wireless

access point. What process does the client use to discover the access

points which are available to it?

probing

beaconing

association

authentication

2.

Refer to the exhibit. Each switch is shown with its MAC address. Which

switch will be elected as the spanning-tree root bridge if the switches areconfigured with their default priority values?

switch A

switch B

switch C

switch D

switch E

switch F


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3.

Refer to the exhibit. Which two switch interfaces would be RSTP edge

ports? (Choose two.)

switch S1, Fa0/1

switch S3, Fa0/5

switch S4, Fa0/1

switch S2, Fa0/3

switch S4, Fa0/2

switch S3, Fa0/2

4. What is a function or characteristic of the native VLAN?

It is the VLAN that supports untagged traffic on an 802.1Q trunk.

It is always assigned to VLAN 1 for backward compatibility.

It is always the same VLAN number for all trunks within an organization.

It is used as the management VLAN throughout the entire switched network.

5. A network administrator must purchase new access layer switches to

deploy across an existing hierarchical network that supports voice and

data traffic. At a minimum, which two features should the new access

layer switches support? (Choose two.)

PoE


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QoS

modular design

Layer 3 support

line speed forwarding rates

6. Which combination is required to establish a connection to initially

configure the Linksys WRT300N wireless access device?

a computer with a console connection to the WRT300N

a computer with a wireless connection to the WRT300N

a computer with an AUX port connection to the WRT300N

a computer configured in the same IP subnet as the WRT300N and a direct

cable connection to it

7.


into two VLANs and configured Router1 for inter-VLAN routing. A test of

the network, however, shows that hosts on each VLAN can only access

local resources and not resources on the other VLAN. What is the mostlikely cause of this problem?

Switch port Fa0/1 is not trunking.

Router interface Fa0/0 is possibly down.

No routing protocol is configured on Router1.

One of the router subinterfaces is possibly down.


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8.

Refer to the exhibit. SW-T has been configured with a single trunking

interface. Which VLANs will be allowed across the trunk?

Only VLAN 1 will be allowed across the trunk.

All configured VLANs will be allowed across the trunk.

Only the native VLAN will be allowed across the trunk.

Only the the management and native VLANs will be allowed across the trunk.

Only VLANs that are configured on the VTP server in the domain will be allowed

across the trunk.


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9.

Refer to the exhibit. Hosts B and C attempt to transmit a frame at the same

time, but a collision occurs. Which hosts will receive the collision

jamming signal?

all hosts that are shown

only hosts B and C

only hosts A, B, and C

only hosts A, B, C, and D

only hosts A, D, E, and F

only hosts D, E, and F

10.


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Refer to the exhibit. The switch VTY lines have been properly configured,

but PC1 is unable to remotely manage the switch. How can this problem

be resolved?

Configure the Fa0/1 interface of the switch in trunk mode.Configure a default gateway on the switch.

Configure the native VLAN on the switch.

Configure the Fa0/1 interface of the switch to allow all VLANs.

11.

Refer to the exhibit. R1 is configured for traditional inter-VLAN routing. R1

can ping computer 3 but cannot ping computer 1. What is a possible

cause for this failure?

S1 port Fa0/11 is in the wrong VLAN.

R1 does not have an active routing protocol.

The IP address of computer 1 is in the wrong logical network.

Router interface Fa0/0 has the wrong trunk encapsulation type configured.

12.

Refer to the exhibit. All hosts are in listen mode. Host 1 and Host 4 both


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transmit data at the same time. How do the hosts respond on the

network? (Choose two.)

After the end of the jam signal, a backoff algorithm is invoked.

Hosts 1 and 4 are operating full duplex so no collision will exist.The hub will block the port connected to Host 4 to prevent a collision.

Hosts 1 and 4 are assigned shorter backoff values to provide them priority to

access the media.

If a host has data to transmit after the backoff period of that host, the host

checks to determine if the line is idle before transmitting.

13.

Refer to the exhibit. The network administrator is planning five additional

VLANs to be shared throughout the VTP domain on S3. What action

should the administrator take before creating the additional VLANs?

Create the VLANs on a switch in VTP server mode and allow them to propogate

to the other switches in the domain.

Modify the configuration revision to 10 to support the additional VLANs.

Enable the VTP pruning mode in order to create the VLANs on S3.Enable the VTP v2 mode.


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14.

Refer to the exhibit. Which two settings show the default value of VTP

configuration on a Cisco 2960 switch? (Choose two.)

revision number

existing VLANs

operating mode

domain name

pruning mode







The PC is set to full duplex. The switch port fails to autonegotiate the duplex

setting and defaults to half duplex, which causes a duplex mismatch.


are being dropped.




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16.


that is shown?

This entry can only be removed from the MAC address table by a networkadministrator.




port Fa0/18.


received on Fa0/18.

17. Which switching method provides error-free data transmission?

fragment-free

fast-forward

integrity-checking

store-and-forward

18. Which wireless topology supports roaming from one access point to

another?

ESS

BSS

IBSS

ad hoc

19. Which value determines if a switch becomes the central point of

reference in the spanning tree topology?

lowest bridge ID


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highest revision number

lowest numeric IP address

highest numeric MAC address

20.

Refer to the exhibit. The broadcast traffic from PC1 is consuming

bandwidth on the interswitch trunks. What should be done to prevent this

from happening?

Move PC1 to a port on SW3.



Enable pruning for VLAN10 on the VTP server.

Associate PC1 as a member of a new VLAN.

21.






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FastEthernet port 0/5 will show an err-disabled message.

22. A wireless access point is configured for WPA2. Which encryption

algorithm will all devices that connect to the access point be required to

use?

AES

PPK

PSK

TKIP

WEP

23. Where is the information of newly created VLANs stored on a switch?

CPU

flash

NVRAM

RAM

24.

Refer to the exhibit. The configuration steps that are listed in the exhibit

have been entered in switch S1 via the console. Subsequent attempts to

telnet to the switch are not successful. What is causing the problem?

The switch must be configured with SSH version 1.

The transport input command must specify Telnet access.

The RSA keys must be returned to zero before SSH will permit Telnet access.

The ip domain-name command must also be entered in line configuration

mode for the vty lines.


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25.

Refer to the exhibit. A new host needs to be connected to VLAN 1. Which

IP address should be assigned to this new host?

192.168.1.11 /28

192.168.1.22 /28

192.168.1.33 /28

192.168.1.44 /28

192.168.1.55 /28

26.

Refer to the exhibit. A new switch, SW3, has been added to the network.

The network administrator determines that VLAN information is not

propagating to SW3. Which command will remedy the problem?

SW1(config)# vtp version 1

SW2(config)# vtp mode client


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SW3(config)# vtp domain Cisco1

SW3(config)# vtp mode transparent

27. Which STP port type can only appear once on a segment, and must be

present in order for traffic to flow on that segment?

non-root port

disabled port

designated port

non-designated port

28. What is one disadvantage that 802.11a wireless has compared to

802.11g?

Use of the 5GHz band requires much larger antennas.

The OFDM modulation technique results in a slower data rate.

There are fewer non-overlapping channels available to help reduce RF

interference.

The use of higher frequencies means that signals are more likely to be

obstructed.

29. Why is MAC address filtering considered a poor choice in securing a

WLAN?

Available bandwidth is reduced.

MAC addresses are easily spoofed.

APs are more susceptible to DoS attacks.

The payload encryption is easily broken.

30. What is the purpose of the Spanning Tree algorithm?

It propagates VLAN configurations to other switches.It restricts broadcast packets to a single VLAN.

It segments a network into multiple broadcast domains.

It prevents loops in a switched network with redundant paths.

31. What are two benefits of a hierarchical network model over a flat

network design? (Choose two.)

reduced cost of equipment

increased network availabilityelimination of equipment downtime


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reduced size of the physical network layout

simplification of management and troubleshooting

elimination of the need for Layer 3 functionality

32. What is the purpose of VLAN trunking?

It improves network performance by reducing broadcast traffic.

It selects the best path to transmit data in a switched network.

It carries the traffic of multiple VLANs through a single link.

It avoids spanning tree loops in a switched network.

33. Which two statements describe the operation of an access layer

Ethernet switch? (Choose two.)

Broadcasts are natively blocked by the switch.

Subnetting is used by the switch to segment local networks.

Frames that contain an unknown destination MAC address are dropped by the

switch.

The source MAC address within a frame is used by the switch to associate a

port with that MAC address.

Frames are directed by the switch from one port to another based on the

destination MAC address within the frame.Data packets are forwarded by the switch from one port to another based on the

destination IP address within the packet.

34. Which two types of traffic are always transmitted as untagged frames?

(Choose two.)

traffic that is assigned to the default VLAN

traffic that is assigned to the native VLAN

traffic from the voice VLAN on an IP phoneTelnet, HTTP, or SSH traffic for switch management

traffic that is leaving an access mode port that is connected to another switch


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35.

Refer to the exhibit. Users A and B are reporting intermittent connectivity

problems. Pre-installation surveys showed strong signal strength from

the AP locations to the client locations. Outside electrical interference has

been eliminated. What will fix the problem?





36. Which statement correctly describes a function of a Layer 2 switch?

It routes packets between different LAN segments.

It uses the destination MAC address to selectively forward a frame.

It performs switching and filtering based on the destination network layer

address.

It drops a frame whose destination MAC address is not in the MAC address

table.


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37.

Refer to the exhibit. The Layer 2 switching design that is shown has been

implemented in a campus environment that is using Spanning Tree






Use Layer 3 switching on the core switch.

Implement Rapid Spanning Tree Protocol.


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38.

Refer to the exhibit. Hosts that are connected to switch SW1 are not able

to communicate with hosts in the same VLAN that are connected to

switch SW2. What should be done to fix the problem?

Introduce a Layer 3 device in the topology.

Configure both switches in VTP transparent mode to allow them to share VLAN

information.

Reconfigure the fa0/1 interface on switch SW1 with a static trunk configuration.

Apply IP addresses that are in the same subnet to FastEthernet 0/1 on SW1and FastEthernet 0/2 on SW2.


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39.

Refer to the exhibit. Both switches are interconnected via a trunk link.

Host A and host B are on the default VLAN but are not able to exchange

traffic. What should be done to fix the problem?

Allow all VLANs on the trunk link.

Remove the native VLAN from the trunk.

Include a router or switch with Layer 3 capabilities.

Configure the same native VLAN on both ends of the trunk.


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40.

Refer to the exhibit. What is the maximum number of VLANs that can be

deleted from the Switch as it is configured?

zero

four

five

eight

nine

41.

Refer to the exhibit. Which two statements are true about the operation of

the interfaces? (Choose two.)

Incoming traffic with VLAN ID 0 is processed by interface fa0/0.

Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.

Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is

down.Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to


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the hardware address.

Traffic inbound on this router is processed by different subinterfaces, depending

on the VLAN from which the traffic originated.

42. What is the benefit of the auto-MDIX feature on a Cisco Catalyst

switch?

dynamically assigns a new management VLAN ID

autonegotiates IP address information for initial management connections

allows the use of straight-through patch cables regardless of connected device

types

places a port immediately in the forwarding state to reduce the time for the

spanning tree to reconverge

43. A network technician is attempting to configure 802.1q trunking on

switch ports Fa0/5 through Fa0/10. Which set of commands will

accomplish this task?

Refer to the exhibit. The devices in the network are operational and

configured as indicated in the exhibit. However, hosts B and D cannot

ping each other. What is the most likely cause of this problem?

The link between the switches is up but not trunked.

The Fa0/11 interface of Switch1 is not configured as a trunk.

Hosts B and D are configured with IP addresses from different subnets.

VLAN 20 and VLAN 30 are not allowed on the trunk between the switches.

28. Refer to the exhibit. Users A and B are reporting intermittent

connectivity problems. Pre-installation surveys showed strong signal

strength from the AP locations to the client locations. Outside electrical

interference has been eliminated. What will fix the problem?






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29. Why is it advisable that a network administrator use SSH instead of

Telnet when managing switches?

SSH uses TCP whereas Telnet does not.

SSH encrypts only the username and password when logging in.SSH encrypts all remote management communications whereas Telnet does

not.

SSH sends a clear text message steam which reduces the bandwidth use

for management.

30. Refer to the exhibit. The teacher host is connected to port Fa0/7 on

switch STW. A student has decided to share access to the Internet by

attaching a hub and laptop to STW as shown. What will be the result of thestudent making this connection?

The Fa0/7 port of STW will be shutdown.

The student will gain full access to the Internet.

Both the teacher and student will be able to receive data but only the teacher

will be able to send.

The frames from the laptop will be dropped, but the teacher host will maintain

connectivity with the network.

31. A network administrator configures a switch port with the command

switchport mode dynamic auto. What is the resulting behavior of the

switch port?

The switch port is able to trunk if the remote switch port is set to auto.

The switch port is able to trunk if the remote switch port is set to desirable.

The switch port will be disabled if it is unable to successfully negotiate trunking.

A successful trunk will be established if the remote switch is non-Cisco but the

port is configured for trunking.

32. Which STP port type can only appear once on a segment, and must be

present in order for traffic to flow on that segment?

non-root port

disabled port

designated port

non-designated port


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33. Refer to the exhibit. What would happen if the network administrator

moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch

SW1?

Host A remains a member of VLAN 10, because the router is routing trafficbetween VLANs.

Host A is no longer a member of VLAN 10, because port Fa0/3 has been

manually assigned to VLAN 30.

Host A remains a member of VLAN 10, because the switch provides dynamic

VLAN assignment for the port.

Host A maintains connectivity to all members of VLAN 10, because it is

connected to the same physical network.

Host A is no longer a member of VLAN 10, but because port Fa0/3 was unused,

it is now a member of VLAN 1.

34. Refer to the exhibit. VLAN 10 has been configured on the VTP server.

Users who are assigned to VLAN 10 are connected as shown in the

exhibit. On the basis of the outputs that are provided, which group of

users will be able to communicate with the users on VLAN 10 on SW1?

all the users who are connected only to SW2

users on VLAN 10 who are connected only to SW3

users on VLAN 10 who are connected only to SW4

users on VLAN 10 who are connected to both SW3 and SW4

35. Refer to the exhibit. Which three options correctly identify information

that could be associated with this output?(Choose three.)

Interface FastEthernet3/0/0 is subinterfaced.

A non-proprietary trunking protocol is in use.

The configuration is appropriate for a router-on-a-stick network design.

A shutdown command has been applied to interface FastEthernet3/0/0.

Interface FastEthernet3/0/0.3 is mapped to the default management VLAN.

An IP address should be applied to FastEthernet3/0/0 for correct data routing.

36. Refer to the exhibit. The Layer 2 switching design that is shown has

been implemented in a campus environment that is using Spanning Tree




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Use Layer 3 switching on the core switch.Implement Rapid Spanning Tree Protocol.

37. Refer to the exhibit. Each switch is configured to participate in STP for

VLANs 1, 10, 20, and 30. Which switch will become the root for VLAN 20?

A

B

C

D

38. Refer to the exhibit. Switches S2 and S3 are properly connected using

an ethernet cable. A network administrator has configured both switches

with VTP, but S3 is unable to propagate VLANs to S2. What could be the

reason for this?

The VTP configuration revision is different on both switches.

The VTP domains are different on both switches.

VTP pruning is disabled.VTP v2 is disabled.

39. In a three-layer hierarchical network design, which distribution layer

function delineates broadcast domains?

routing between VLANs

aggregating traffic flows

providing redundant links

reducing the network diameter

40. Which parameter is used to uniquely identify one wireless network

from another?

SSID

OFDM

WEP

DSSS


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41. What is one disadvantage that 802.11a wireless has compared to

802.11g?

Use of the 5GHz band requires much larger antennas.

The OFDM modulation technique results in a slower data rate.There are fewer non-overlapping channels available to help reduce RF

interference.

The use of higher frequencies means that signals are more likely to be

obstructed.

42. Which three statements are correct concerning the default

configuration of a new switch? (Choose three.)

It is configured in VTP server mode.STP is automatically enabled.

The first VTY line is automatically configured to allow remote connections.

VLAN1 is configured with a management IP address.

All switch ports are assigned to VLAN1.

The enable password is configured as cisco.

43. Refer to the exhibit. How is port Gi1/1 on SWT-A functioning in the

spanning-tree topology?It is sending and receiving data frames.

It is receiving BPDUs, but not sending data frames.

It is participating in the election process by forwarding the BPDUs it receives.

It is receiving BPDUs and populating the MAC address table, but not sending

data.

44. While configuring a new switch, a network administrator configures

the switch as an HTTP server. What benefits does this configuration

provide?

This allows the switch to host web pages for the network.

This allows remote VPN connections to the switch over the Internet.

This is required if a web server or web farm is attached to the switch.

This allows web-based configuration tools to be used with the switch.

45. Which statement describes the use of voice VLANs in Cisco IP

telephony?

The voice VLAN carries both tagged and untagged traffic.


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The voice VLAN carries untagged traffic having special QoS markings.

The voice VLAN must be configured on the switch port to which the IP phone

attaches.

Data and voice frames are tagged with same VLAN ID between the IP phoneand the switch when a voice VLAN is configured.

46. Refer to the exhibit. If switch SW1 is configured with the four VLANs

as shown in the exhibit, how many physical interfaces are needed on

router R1 to configure inter-VLAN routing using subinterfaces?

zero

one

twofour

47.


that is shown?

This entry can only be removed from the MAC address table by a network

administrator.




port Fa0/18.


received on Fa0/18.

48. Refer to the exhibit. The VTP domain has been configured as shown in

the exhibit. The network technician accidentally configured the VTP server


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as a VTP client. After the technician reloaded the switches, all users in the

VTP domain started to complain that they lost connectivity to the users on

the same VLANs that are connected to other switches. What should be

done in the future to prevent losing all VLAN configurations in a VTP

domain?

Configure all switches in VTP transparent mode and copy the VLAN

configuration into flash.

Configure all switches in the network as VTP clients and copy the VLAN

configuration into NVRAM.

Create a new domain and configure a second switch as a VTP server to take

over in case of a primary VTP server failure.

In the same domain, configure a second switch as a VTP server to take over in

case of a primary VTP server failure.

49. Refer to the exhibit. How does SW1 manage traffic coming from Host

A?

SW1 drops the traffic because it is untagged.

SW1 leaves the traffic untagged and forwards it over the trunk.

SW1 tags the traffic with the lowest VLAN ID value and forwards it over the

trunk link.

SW1 encapsulates the traffic with 802.1Q encapsulation and forwards it over

the trunk link.







The PC is set to full duplex. The switch port fails to autonegotiate the duplex

setting and defaults to half duplex, which causes a duplex mismatch.


are being dropped.




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51. Refer to the exhibit. A network administrator has segmented the

network into two VLANs and configured Router1 for inter-VLAN routing. A

test of the network, however, shows that hosts on each VLAN can only

access local resources and not resources on the other VLAN. What is the

most likely cause of this problem?

Switch port Fa0/1 is not trunking.

Router interface Fa0/0 is possibly down.

No routing protocol is configured on Router1.

One of the router subinterfaces is possibly down.

52. What impact does the use of the mdix auto configuration command

have on an Ethernet interface on a switch?automatically detects duplex settings

automatically detects interface speed

automatically detects copper cable type

automatically assigns the first detected MAC address to an interface

53

Refer to the exhibit. A network administrator needs to add IP phones to

the network. To which devices should the IP phones connect?

AS1 and AS2

DS1 and DS2

DS1, DS2, and CS1

AS1, AS2, DS1, and DS2


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54. Which CLI mode allows users to access all device commands, such as

those used for configuration, management, and troubleshooting?

user EXEC mode

privileged EXEC modeglobal configuration mode

interface configuration mode

55.

Refer to the exhibit. All hosts are in listen mode. Host 1 and Host 4 both

transmit data at the same time. How do the hosts respond on the

network? (Choose two.)

After the end of the jam signal, a backoff algorithm is invoked.

Hosts 1 and 4 are operating full duplex so no collision will exist.

The hub will block the port connected to Host 4 to prevent a collision.

Hosts 1 and 4 are assigned shorter backoff values to provide them priority to

access the media.

If a host has data to transmit after the backoff period of that host, the host

checks to determine if the line is idle before transmitting.


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56.

Refer to the exhibit. An administrator documented the output of a CAM

table from an Ethernet switch as shown. What action will the switch take

when it receives the frame shown at the bottom of the exhibit?

discard the frame

forward the frame out port 2

forward the frame out port 3

forward the frame out all ports

forward the frame out all ports except port 3

add station 00-00-3D-1F-11-05 to port 2 in the forwarding table

57. What will be the effect of the command S1# copy system:running-

config172.16.2.155/tokyo-config?

The IOS will be copied to the TFTP server.

The configuration file named tokyo-config will overwrite the startup configuration

file on S1.

The running configuration file on S1 will be saved via TFTP to a file named

tokyo-config.

The contents of NVRAM on S1 will become the startup configuration file on the

tokyo switch.

58. Company policy requires disabling the command history buffer on

network devices. An administrator enters terminal no history size at the

command prompt on a Cisco Catalyst switch and receives no error

messages back, but the command history buffer is still available. What is

the problem?

The command contained a syntax error.


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The Cisco IOS version does not support disabling the command history buffer.

The command history can only be disabled on a router, not a switch.

The size parameter reset the default buffer size but did not disable access to

the buffer.

59. A network administrator is implementing VTP in a large campus LAN

that contains one hundred switches. What are valid considerations for

reliability and administration?

Using server mode on a single master switch and client mode on all other

switches will provide the most fault tolerance for retaining VLAN information in

all switches if power is lost on the network.

Using transparent mode on all switches will allow for efficient administration andprevent VLAN data loss from the loss of any single switch.

Configuring several switches in server mode will allow all VLANs to be entered

from a single switch and preserve VLAN data if any of the switches or

connections are lost.

Configuring one primary and one backup switch in server mode and all other

switches in transparent mode will provide fault tolerance for the VLAN data and

allow for efficient distribution of the VLAN configurations to all switches.

60.

Refer to the exhibit. Switch SW-A is to be used as a temporary

replacement for another switch in the VTP Student domain. What two

pieces of information are indicated from the exhibited output? (Choose

two.)

The other switches in the domain can be running either VTP version 1 or 2.


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There is a risk that the switch may cause incorrect VLAN information to be sent

through the domain.

VTP will block frame forwarding on at least one redundant trunk port that is

configured on this switch.VLAN configuration changes made on this switch will be sent to other devices in

the VTP domain.

This switch will update its VLAN configuration when VLAN changes are made

on a VTP server in the same domain.

61. What is the purpose of issuing the command switchport mode access

on a switch interface?

disable port securitymake the port operational

override the default port behavior

force the port to be a part of a single vlan

62.






FastEthernet port 0/5 will show an err-disabled messag

63.

Refer to the exhibit. What will be the result of the commands that areshown in the exhibit?


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Only clients on VLAN 2 will be able to use DHCP for addressing.

DHCP server responses will only be permitted on interface Fa0/2.

Only 100 clients are permitted to request DHCP addresses on VLAN 2.

Client requests for DHCP addresses will be filtered out if the requests are notreceived on interface Fa0/2.

64. Why is it important that the network administrator consider the

spanning-tree network diameter when choosing the root bridge?

The network diameter limitation is 9.

BPDUs may be discarded because of expiring timers.

The cabling distance between the switches is 100 meters.

The network diameter must be set to the number of meters of the cablebetween the root bridge and its farthest connected switch.

65.

Refer to the exhibit. What is the result of issuing these commands?

The enable password will be set.

The password will be set for the first Telnet connection.

The password will be set for the console connection.

The password will be set for the auxiliary connection.

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